InDesign 2021 becomes unresponsive on "what's new" screen after installing
I've just installed InDesign 2021, and it starts up fine, but then goes to show me what's new in the update, and then becomes unresponsive. In the Task Manager it doesn't say it's crashed, but all I can do is close the program through the Task Manager.

Tried uninstalling, clearing cache etc and reinstalling, as well as doing that and reinstalling a previous version, but each time the same.
Using Windows 10.
Any suggestions?